AA 2319 (UNS A92319) is an aluminium alloy principally containing copper (5.8–6.8%) as an alloying element. It also contains ≤0.20% silicon, ≤0.30% iron, 0.20–0.40% manganese, ≤0.02% magnesium, ≤0.10% zinc, 0.10–0.20% titanium, 0.05–0.15% vanadium, 0.10–0.25% zirconium, ≤0.0003% beryllium (in arc welding electrodes) and up to 0.15% trace elements. The density of 2319 aluminium is . This alloy was first registered in 1958, in the United States. This alloy is typically used as an arc welding electrode or filler material for use with AA 2219 workpieces. References Aluminium alloys Aluminium–copper alloys